With the continuous increase of the proportion of new energy grid connection in China, improving the new energy consumption level has become the key to breaking through the bottleneck of new energy development. Carrying out the research in the cross-regional consumption strategy at different time scales is an effective way. In this paper, two cross-regional power grids are taken as research cases, and the operating characteristics and influencing factors of new energy consumption in different regions are analyzed in detail. Further, a cross-regional new energy consumption strategy is proposed in different time scales, including medium-long term, day ahead and day in. Among them, the medium-long term consumption strategy aims to achieve the optimization of medium-long term new energy consumption efficiency, and focuses on the factors affecting the standardization of equipment operation and maintenance, power generation plan management, and trading power allocation. The day ahead consumption strategy focuses on the factors affecting the peak shaving capacity of power grid in different operation periods and the transmission quality of DC power supply lines. The day in consumption strategy focuses on the factors affecting grid architecture and voltage security of each node. Finally, the feasibility and effectiveness of relevant strategies are verified by the simulation model. The results show that the proposed cross-regional new energy consumption strategies at different time scales can effectively solve the regional new energy consumption problem, reduce the phenomenon of wind and photovoltaic abandonment, and it has a certain practicality and reliability.